Location: indoor or outdoor
Materials: none
It's never too early to start talking about emotions. An important element to all social-emotional development is having the vocabulary to label feelings. You can start this with your infants.
When your infants are experiencing different emotions, use your words to label them. For example, when a baby looks sad you can say, "You are so sad right now. Let's see what we can do to make that better." Or you could say, "I see that you are happy right now! You are smiling and laughing!"